International Journal of Environmental Analytical Chemistry Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713640455 Preconcentration and determination of high leachable pesticides residues in water using solid-phase extraction coupled with high-performance liquid chromatography Yahya S. Al-Degs a; Mohammad A...

An experimental database is compiled in order to fingerprint the scales formed over the hot surfaces of heat exchangers, in cooling water systems or other systems with similar chemistry. To collect these data, a dynamic simulating pilot plant was designed with considerable application flexibility among which simultaneous flow of water with different velocity and heat fluxes to three simulat...

Introduction William ‘‘Bill’’ Back (Figure 1) was one of the great ‘‘idea people’’ in low-temperature geochemistry during the blossoming of ground water hydrology in the latter half of the twentieth century. Prior to the1950s, most of the research in ground water chemistry was related to water quality and was carried out by chemists who rarely ventured into the field. Bill, Ivan Barnes, Bruce H...

Abstract. Openly accessible global-scale surface water chemistry datasets are urgently needed to detect widespread trends and problems, help identify their possible solutions, determine critical spatial data gaps where more monitoring is required. Existing limited with respect availability, sample size and/or sampling frequency, geographic scope. These limitations inhibit researchers from tackl...

A transient model simulation of the 40-year time period 1960 to 1999 with the coupled climate-chemistry model (CCM) ECHAM4.L39(DLR)/CHEM shows a stratospheric water vapor increase over the last two decades of 0.7 ppmv and, additionally, a short-term increase after major volcanic eruptions. Furthermore, a long-term decrease in global total ozone as well as a short-term ozone decline in the tropi...

Experimental hydrothermal geochemistry has made great strides on the basis of stoichiometric equilibrium studies, measured kinetic rates, and bulk-sensitive spectroscopic data, but there are current problems in hydrothermal geochemistry ranging from deep aquifer chemistry to nuclear waste tank chemistry that can benefit from new techniques able to provide direct spectroscopic and microscopic in...

We investigated the influence of riparian and whole watershed land use as a function of stream size on surface water chemistry and assessed regional variation in these relationships. Sixty-eight watersheds in four level III U.S. EPA ecoregions in eastern Kansas were selected as study sites. Riparian land cover and watershed land use were quantified for the entire watershed, and by Strahler orde...

A synthetic Topopah Spring Tuff water representative of one type of pore water at Yucca Mountain, NV was evaporated at 95 °C in a series of experiments to determine the geochemical controls for brines that may form on, and possibly impact upon the long-term integrity of waste containers and drip shields at the designated high-level, nuclear-waste repository. Solution chemistry, condensed vapor ...